Influence of alkali metal ions on the fracture properties of glass polyalkenoate (ionomer) cements

Barra, Eamonn De; Hill, Robert G.

doi:10.1016/s0142-9612(97)00129-4

Cited by 43 publications

(24 citation statements)

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“…However, incorporation of sodium has a deleterious influence on the solubility, hydrolytic stability and mechanical properties of the cement. Sodium is likely to be released from the glass in greater proportions relative to the other cations present in the glass since sodium is known to be relatively mobile at low temperatures in silicate glasses and can be easily exchanged for hydrogen ions [38]. Sodium ions compete with calcium and aluminum cations for carboxylate groups in the polyacid chains and therefore inhibit the cross-linking process.…”

Section: Cement Compositionmentioning

confidence: 99%

“…In the latter case the liquid is simply water in which the dried polyacid dissolves upon mixing [7,14]. The acid degrades the glass structure, hydrolyses the bonds of the glass network and releases aluminum and calcium cations which are chelated by the carboxylate groups and serve to crosslink the polyacrylic chains [38]. Resulting cement properties are mainly influenced by the degree of crosslinking.…”

Section: Cement Compositionmentioning

confidence: 99%

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Dental Glass Ionomer Cements as Permanent Filling Materials? – Properties, Limitations and Future Trends

2009

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Glass ionomer cements (GICs) are clinically attractive dental materials that have certain unique properties that make them useful as restorative and luting materials. This includes adhesion to moist tooth structures and base metals, anticariogenic properties due to release of fluoride, thermal compatibility with tooth enamel, biocompatibility and low toxicity. The use of GICs in a mechanically loaded situation, however, has been hampered by their low mechanical performance. Poor mechanical properties, such as low fracture strength, toughness and wear, limit their extensive use in dentistry as a filling material in stress-bearing applications. In the posterior dental region, glass ionomer cements are mostly used as a temporary filling material. The requirement to strengthen those cements has lead to an ever increasing research effort into reinforcement or strengthening concepts.

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Section: Cement Compositionmentioning

confidence: 99%

Section: Cement Compositionmentioning

confidence: 99%

Dental Glass Ionomer Cements as Permanent Filling Materials? – Properties, Limitations and Future Trends

2009

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“…The cements set via a neutralization reaction type acid-base between the glass particles and acidic polymer [7][8][9][10]. This setting reaction involves the acid hydrolysis of the Si-O-Al bonds of the glass network leading to the release of Ca 2+ and Al 3+ cations which are chelated by the carboxylate groups resulting in a formation of a hard ceramic like cement.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of glass ionomer cements properties obtained from niobium silicate glasses prepared by chemical process

Bertolini¹,

Palma-Dibb²,

Zaghete³

et al. 2005

Journal of Non-Crystalline Solids

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“…These include the extraction rate of ions from the glass, which is controlled by the composition of the glass and liquid, and the binding of cations to the polyanion chain. The number and type of anions and cations released from the glass particles will determine the extent of crosslinking of the polysalt matrix and the cement properties [26,27].…”

Section: Initial and Final Setting Timesmentioning

confidence: 99%

Evaluation of Calcium Fluoroaluminosilicate Based Glass Ionomer Luting Cements Processed Both by Conventional and Microwave Assisted Methods

et al. 2015

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Calcium fluoroaluminosilicate glasses (CAS) are used in the formulation of glass ionomer cements for dental applications. However, the cements obtained from CAS glasses were found to be radiolucent. In this study, the influence of substituting Zn, Sr and Mg for Ca of CAS glasses was investigated with respect to the structure and setting characteristics, mechanical properties, and radiopacity of cements designed for luting applications. Three glass compositions based on substitution of Zn, Sr and Mg for Ca at 1:1 molar ratio was synthesized. They were coded as the G 021 (Ca: Zn), G 022 (Ca: Sr), G 023 (Ca: Mg). G 021 and G 022 glasses were processed by conventional melt quench route, whereas G 023 was processed by microwave melt-quench route. Each glass was then mixed with Fuji Type I GIC liquid in order to evaluate the properties of novel cements at different powder/liquid ratios. X-ray diffraction and Fourier Transform-Infrared spectroscopy analysis confirmed the OPEN ACCESS Technologies 2015, 3 59 structure of the processed glasses. The average particle size of the processed glass powders was within specification limits for luting applications (<15 μm). The substitution of Zn, Sr and Mg for Ca at 1:1 molar ratio increased the reactivity of the respective glasses. This has been reflected in their respective setting characteristics and mechanical properties. The optimal combination of setting time, strength and radiopacity for the cements examined here was shown by G 022 cements. The microwave melting can be utilized for processing ionomer glasses as it did not alter the structure and properties of G 023 cement.

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Influence of alkali metal ions on the fracture properties of glass polyalkenoate (ionomer) cements

Cited by 43 publications

References 0 publications

Dental Glass Ionomer Cements as Permanent Filling Materials? – Properties, Limitations and Future Trends

Dental Glass Ionomer Cements as Permanent Filling Materials? – Properties, Limitations and Future Trends

Evaluation of glass ionomer cements properties obtained from niobium silicate glasses prepared by chemical process

Evaluation of Calcium Fluoroaluminosilicate Based Glass Ionomer Luting Cements Processed Both by Conventional and Microwave Assisted Methods

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